Table 2

Estimation of α (male:female ratio of mutation rate) from different branch lengths in the neo-sex
system of black muntjac

neo-Y/neo-X

α

95% CI of α

Internal branches

4.0442 ± 1.2633

∞

25.3848 to ∞

External branches

3.2768 ± 1.2356

∞

4.2578 to ∞

Summed branches

3.6857 ± 0.8867

∞

27.8507 to ∞

Note that we calculated neo-Y:neo-X ratios of mutation rate from branch lengths designated
in Figure 2a. We further calculated their confidence intervals (CIs) and estimated
α values following [30,31].